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Ekrause



Joined: 11 May 2005
Posts: 782
Location: I'm here now.

PostPosted: Wed Jul 13, 2005 10:30 pm    Post subject: Reply with quote

Got back to the office after a couple weeks off and tried this on a crown prep. It might just be me, but the adhesive layer was noticeably shinier.
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john kanca



Joined: 14 May 2005
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PostPosted: Wed Jul 13, 2005 10:39 pm    Post subject: Reply with quote

That's what I am seeing too. It is a very rich resinous layer, better than I have yet seen.
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Thu Jul 14, 2005 8:00 am    Post subject: drying dentin Reply with quote

Drying dentin for 10 seconds prior to applying Simplicity gave me bond strengths at one hour of over 45 MPa. John got an average of 51 MPa! I'll be doing a large batch of Simplicity to 10 second dried dentin as well as 1 second dried dentin and testing these next Wednesday. Let you know a week from today.

As for desiccation prior to placing other adhesives - The ones I've tested so far reduced bond strengths rather than increasing them as per Simplicity! Simplicity strikes again - less technique sensitivity than thought of before!! I'll be doing more of these in-vitro as well. BUT today I'm placing all direct composites drying for 10 seconds first. I doubt there will be any problem with sensitivity, and if the bond strenghts are increased - wonderful!!.
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Thu Jul 14, 2005 8:42 am    Post subject: Reply with quote

For all those here - today is JK's 39th (Yeah Right - he and Jack Benny) Birthday! He's in a plane flying to Utah right now. But I'm sure he would appreciate our well wishes.
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Mark J Fleming DDS



Joined: 11 May 2005
Posts: 736
Location: Sarasota, FL

PostPosted: Thu Jul 14, 2005 9:21 am    Post subject: Reply with quote

Thanks, Gerry, for the heads up! Cool
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Fri Jul 15, 2005 12:07 am    Post subject: Reply with quote

Using this exact technique I got immediate bond strengths here at Ultradent of 32 and 34 mPa with Simplicity when everyone else was averaging about 16 with PQ1. That is not to say that PQ1 is bad, as it is a good material, but it puts things in perspective.

We did good!

Real good! Very Happy Cool
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Fri Jul 15, 2005 8:25 am    Post subject: Reply with quote

10 Second drying w absolutely dry nitrogen at 40 PSI on each tooth I bond. (Started doing this yesterday in honor of JK's b'day after I did trhe tests on Wed.) How dry is "dry" & how moist is "moist" is not a problem with Simplicity. NOT SO with other adhesives! If mild desiccation (OK not 5 hours!) increases the adhesion with Simplicity, and there is no sensitivity. seems like a fine idea to me!! I'm documenting all these cases.

Gerry
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Fri Jul 15, 2005 10:04 am    Post subject: Reply with quote

Checked with all the patients that I've treated with the 10 second dentin drying technique prior to applying Simplicity. NO SENSITIVITY! And nothing has fallen out - yet.

I just realized that the 51.8 MPa JK got was after 2 hours. The 45 MPa I got was only about 50 minutes. Still not too shabby!!

Will have many more 24 hour studies next week!

[/img]
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john kanca



Joined: 14 May 2005
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PostPosted: Fri Jul 15, 2005 4:02 pm    Post subject: Reply with quote

DO THIS DO THIS DO THIS

I ran some tests here at Ultradent this morning drying as I have indicated. The immediate bond strengths we did in the lab (Phil Brown was with me) were averaging about 37 mPa. We also checked S3 (th one bottle system from Kuraray). it got about 19 mPa to dentin and about the same to enamel. Simplicity got around 27 mPa to enamel, same technique as above.

What makes me really happy is that this forum is positively THE cutting edge in adhesive restorative dentistry. Very Happy
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DrDan



Joined: 11 May 2005
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Location: Longwood, FL

PostPosted: Fri Jul 15, 2005 5:02 pm    Post subject: Reply with quote

john kanca wrote:
DO THIS DO THIS DO THIS

What makes me really happy is that this forum is positively THE cutting edge in adhesive restorative dentistry. Very Happy


We're kinda happy about it ourselves!!

Dan Very Happy
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Gerry



Joined: 13 May 2005
Posts: 448
Location: Tarrytown NY

PostPosted: Fri Jul 15, 2005 5:31 pm    Post subject: Reply with quote

NEWS FLASH

Every patient that I treated over the past 2 days with the 10 second drying technique prior to placing Simplicity was called and NOT ONE has experienced any degree of sensitivity to anything!

The in-vitro SBS tests clearly show increased bond strength. The in-vivo results are fine.

JK hits another one into the seats!! Laughing
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john kanca



Joined: 14 May 2005
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PostPosted: Fri Jul 15, 2005 5:53 pm    Post subject: Reply with quote

Thank you, Gerry- and anyone using this to seal crown preps please pay attention to the delivery. My impression is that there will be virtually NO sensitivity when inserting these crowns at all.

I also think that this will result in a thcker resin-inflitration and hybrid layer which in turn makes for durability of bond. That is something that is missing from the one bottle systems- a decent hybrid layer.
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Fri Jul 15, 2005 6:07 pm    Post subject: Reply with quote

durability of bond.

As in H20 trees over time?!
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john kanca



Joined: 14 May 2005
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PostPosted: Sat Jul 16, 2005 4:21 am    Post subject: Reply with quote

Gerry wrote:
durability of bond.

As in H20 trees over time?!


Right you are, Ken!


and Dan says hi!
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Gerry



Joined: 13 May 2005
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Location: Tarrytown NY

PostPosted: Sat Jul 16, 2005 7:57 am    Post subject: Reply with quote

From JK - Posted: Sat Jul 16, 2005 4:21 am

Are you still up from last night or getting an early start?!

As Simplicity 1 is H2O, as is Interface, the degree of moisture should not be as critical as with other non-H2O based adhesives. I've always posed the question "How dry is 'dry' and how moist is 'moist' when applying various adhesives to dentin".
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